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need help problems with P0720 Output Shaft Speed Sensor circuit

hi, i have a mustang cobra, but it doesnt reads the mph, and it shows this code P0720 Output Shaft Speed Sensor circuit. i already put a new sensor from ford, thinking it was that, and its still the same thing, i checked if the tranny had the gear that makes the sensor measure the mph, and yes it has it, i dont know how to check if the cluster its fine, i disconnect the battery and connect it again and al the gauges move, so i dont know if thats the way to check it if it works, and i dont know how to check if the sensor its getting signal, maybe its a broken cable of the harnes, but i dont know how to check that? can some one help me please, cause i cant use the car like this and i want to go to houston on christmas in my car not in my dad's truck, so can some one help me out ill apreciated a lot, thanks

i already made the instrument cluster self-diagnostic mode, and the cluster its working, so the problem its not from the cluster and the sensor, so the only left its the harness o ecu?? or what else could it be? cause in the part of the self-diagnostic in the part of enG and m it apears 0.00 and there says that if it apears 0.00 on both then the input is not received. what does that means?? that the sensor its not getting signal??? thanks for all your help.